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Extracted row_index and cell_row from the inner loop

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Defined constants that don't have to be recomputed several times
This commit is contained in:
Ivo Flipse
2015-06-18 18:45:29 +02:00
parent 1b9a15a4d4
commit 9c141eadf8
1 changed files with 9 additions and 7 deletions
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skimage/feature/_hoghistogram.pyx
+9 -7
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@@ -45,17 +45,19 @@ cdef float cell_hog(cnp.float64_t[:, :] magnitude,
cdef float total = 0.
for cell_row in range(-cell_rows/2, cell_rows/2):
cell_row_index = row_index + cell_row
if (cell_row_index < 0 or cell_row_index >= size_rows):
continue
for cell_column in range(-cell_columns/2, cell_columns/2):
if (row_index + cell_row < 0
or row_index + cell_row >= size_rows
or column_index + cell_column < 0
or column_index + cell_column >= size_columns
or orientation[row_index + cell_row, column_index + cell_column]
cell_column_index = column_index + cell_column
if (cell_column_index < 0 or cell_column_index >= size_columns
or orientation[cell_row_index, cell_column_index]
>= orientation_start
or orientation[row_index + cell_row, column_index + cell_column]
or orientation[cell_row_index, cell_column_index]
< orientation_end): continue
total += magnitude[row_index + cell_row, column_index + cell_column]
total += magnitude[cell_row_index, cell_column_index]
return total